With receiver Michael Bennett (knee) out and All-SEC tailback Todd Gurley (ankle) questionable for Saturday's game against No. 25 Missouri (5-0, 1-0 SEC), No. 7 Georgia (4-1, 3-0) has little time to identify the personnel who must play larger roles in order to hang with a Tigers offense that ranks among the nation's most productive units.

Here are four groups/trends to watch as the Bulldogs move forward:

Freshman tailbacks: With Georgia's two star backs both possibly out Saturday, it's certainly possible we will see another heavy dose of true freshmen J.J. Green -- who rushed for 129 yards last Saturday against Tennessee -- and Brendan Douglas at tailback.

Jim Brown/USA TODAY SportsBrendan Douglas and fellow freshman J.J. Green likely will be asked to shoulder more of the load.

That isn't necessarily a scary proposition for the Bulldogs, who have seen the young duo perform well in practice and in spot duty up until last Saturday's overtime win.

“We see those guys in practice, and they do a great job of breaking tackles or shaking guys or breaking loose for touchdowns against a great defense,” offensive guard Chris Burnette said. “Seeing them do that in practice, we know they're capable of doing that in a game.”

The larger question is what happens if Gurley is unable to play Saturday. If one of the top running backs in the nation remains unable to go as the week progresses -- and he once again did not practice on Monday -- Georgia's coaches might have to take a longer look this week at freshman A.J. Turman.

He seemed like a certain redshirt candidate a week ago, but Richt's staff must determine whether the two freshmen who already have played and walk-ons Kyle Karempelis and Brandon Harton would be enough to carry the load without Gurley and Marshall.

“A lot may depend on how Gurley's doing,” Richt said. “If Gurley comes back and you've got the other two, you don't normally have to go three backs. But if Gurley can't go, then we've got to try to figure out what we're going to do. We've got Harton and Karempelis that have played for us before, so those are possibilities. We've just got to kind of try to figure that out.

Wild cards: Speaking of Turman, he's not the only newcomer who has not played yet and still might or might not make an impact this fall.

Receivers Tramel Terry and Jonathon Rumph -- Georgia's second- and sixth-highest-rated 2013 signees in ESPN's player rankings -- have not played to date but still could factor into offensive coordinator Mike Bobo's plans ... eventually.

Richt said "it's very doubtful that [Rumph would] be ready" for the Missouri game while still dealing with a left hamstring strain, but "after that, we're going to definitely try to get him ready."

Meanwhile, Terry struggled during preseason practice while still recovering from offseason ACL surgery and seemed set to redshirt this season. But because of the receiver attrition, the freshman might be someone the coaches eventually consider.

“I just think the longer he practices coming back from his injury, the better he'll be,” Richt said. “Is he really ready for this type of competition? I don't know.

“And the fact that he hasn't had a lot of reps with our offensive unit, he's been working mainly scout team reps, and he's a freshman, so it's hard to really be ready in all the ways that you have to be ready -- not only physically, but knowing the game plan and just having experience running the routes and playing in games like that. So I'm not counting him out, but I really don't know the answer right now.”

More tight ends: Considering the level of in-game attrition that occurred at Tennessee, perhaps the most surprising statistic from that game was that neither Arthur Lynch nor Jay Rome made a reception.

Expect that to rank as a statistical anomaly moving forward.

When Georgia's receivers encountered a number of injury issues last season, Lynch and Rome were two of the top pass-catching beneficiaries. The two tight ends combined for 25 catches for 367 yards -- 251 by Lynch and 116 by Rome – over the final six games last season. In the first eight games of 2012, they combined for 10 catches and 216 yards.

Lynch and Rome have 212 yards -- 169 by Lynch and 43 by Rome -- this season.

Scott Cunningham/Getty ImagesWith injuries mounting, senior Rantavious Wooten might be counted on to play a much larger role.

Replacement receivers: Junior Chris Conley -- who led Georgia with 64 receiving yards and made a tremendous one-handed touchdown catch against Tennessee -- is nearly the only known quantity in the Bulldogs' receiving corps for the time being.

“We're deep in the receiver room,” McGowan said. “A lot of people don't know that, because they haven't played, but they're at Georgia for a reason.”

Bennett will undergo arthroscopic surgery today to determine the extent of his knee injury. Even if he receives positive news, the junior will certainly miss the Missouri game and possibly more time after that.

Since they have dealt with regular injuries over the last two seasons, the receivers believe they are well-prepared for their current situation and now must take advantage of this opportunity.

“[Receivers coach Tony] Ball always tells me, 'Prepare like you are the starter, and you never know, because you're one play away from [being] a starter,' ” said Wooten, who caught two touchdowns against Tennessee. “So all the guys know that in the room, and I know that myself, and I always had that in the back of my head. Any guy could be the next man up. The coaches have the final decision on that, but at the end of the day, that's what we do, we practice, and we get ready for those types of situations.”

Peach State: Top Tier Recruiting Ground?

California, Florida and Texas are largely considered the "Big Three" in college football recruiting. But national recruiting analyst Gerry Hamilton joins ESPN's Phil Murphy to explain why Georgia deserves to be in the top tier and has numbers to prove it.

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Peach State: Top Tier Recruiting Ground?

California, Florida and Texas are largely considered the "Big Three" in college football recruiting. But national recruiting analyst Gerry Hamilton joins ESPN's Phil Murphy to explain why Georgia deserves to be in the top tier and has numbers to prove it.